xsk: tighten UMEM headroom validation to account for tailroom and min frame_CVE-2026-43093

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: tighten UMEM headroom validation to account for tailroom and min frame\n\nThe current headroom validation in xdp_umem_reg() could leave us with\ninsufficient space dedicated to even receive minimum-sized ethernet\nframe. Furthermore if multi-buffer would come to play then\nskb_shared_info stored at the end of XSK frame would be corrupted.\n\nHW typically works with 128-aligned sizes so let us provide this value\nas bare minimum.\n\nMulti-buffer setting is known later in the configuration process so\nbesides accounting for 128 bytes, let us also take care of tailroom space\nupfront.",
    "published": "2026-05-06T07:40:25.266Z",
    "modified": "2026-05-08T12:40:30.221Z",
    "type": "cve",
    "title": "xsk: tighten UMEM headroom validation to account for tailroom and min frame",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f\nhttps://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1\nhttps://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12\nhttps://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39\nhttps://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931",
    "id": "CVE-2026-43093",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 99e3a236dd43d06c65af0a2ef9cb44306aef6e02\nLinux Linux 99e3a236dd43d06c65af0a2ef9cb44306aef6e02\nLinux Linux 99e3a236dd43d06c65af0a2ef9cb44306aef6e02\nLinux Linux 99e3a236dd43d06c65af0a2ef9cb44306aef6e02\nLinux Linux 99e3a236dd43d06c65af0a2ef9cb44306aef6e02\nLinux Linux ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee\nLinux Linux 25c9cdef57488578da21d99eb614b97ffcf6e59f\nLinux Linux 98d3c852e63b49129515dd18c875999efaf8530a\nLinux Linux 5.7",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}